EP3490776A1 - Verfahren zum herstellen eines flüssigkeitsbehälters, flüssigkeitsbehälter für ein kraftfahrzeug und spritzgusswerkzeug - Google Patents
Verfahren zum herstellen eines flüssigkeitsbehälters, flüssigkeitsbehälter für ein kraftfahrzeug und spritzgusswerkzeugInfo
- Publication number
- EP3490776A1 EP3490776A1 EP16809305.2A EP16809305A EP3490776A1 EP 3490776 A1 EP3490776 A1 EP 3490776A1 EP 16809305 A EP16809305 A EP 16809305A EP 3490776 A1 EP3490776 A1 EP 3490776A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- cavity
- injection molding
- plastic component
- mold cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/164—The moulding materials being injected simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
- B29C45/1643—Making multilayered or multicoloured articles having a "sandwich" structure from at least three different materials or with at least four layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03177—Fuel tanks made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
- B29C2045/1664—Chemical bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/167—Making multilayered or multicoloured articles injecting the second layer through the first layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
- B29C2045/2671—Resin exit gates or bleeder passages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03032—Manufacturing of fuel tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03032—Manufacturing of fuel tanks
- B60K2015/03046—Manufacturing of fuel tanks made from more than one layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03486—Fuel tanks characterised by the materials the tank or parts thereof are essentially made from
- B60K2015/03493—Fuel tanks characterised by the materials the tank or parts thereof are essentially made from made of plastics
Definitions
- the invention relates to a method for producing a liquid container for a motor vehicle, a liquid ⁇ keits practicer for a motor vehicle and an injection molding tool.
- a plurality of different operating fluids stored in liquid containers or tanks This may be, for example, fuel, engine oil, urea solution for selective catalytic reduction or also cleaning fluid for the glazing of the headlights or the passenger cell.
- Plastic walls of such tanks constructed multi-layered and have a barrier layer, which serves as a diffusion barrier for the stored fuel.
- These multi-layer plastic walls with barrier layer are usually first in the coextrusion blow coextruded as a mat or tubular semi-finished and brought to ⁇ closing by blow molding in the intended shape.
- the tubular or mat-shaped coextrusion ensures that the barrier layer extends over the entire tank wall over its entire surface.
- the entire void volume for Be ⁇ supply of fuel is enclosed or enclosed by the barrier layer.
- the injection molding process basically has the advantage that the intermediate step of the extrusion of the semifinished product can be saved, in which the plasticized plastic is injected directly into a cavity of an injection molding tool.
- the present invention is based on the technical object to specify a method for manufacturing a liquid container for a motor vehicle at ⁇ which the disadvantages described above, or at least having to a lesser extent, and in particular ⁇ sondere a full-surface forming a barrier layer made ⁇ light ,
- a liquid container for a motor vehicle at ⁇ which the disadvantages described above, or at least having to a lesser extent, and in particular ⁇ sondere a full-surface forming a barrier layer made ⁇ light .
- the invention relates to a method for producing a liquid container for a motor vehicle, which is composed of attorneyss ⁇ least two shells, wherein the following process steps are performed:
- the injection mold has at least one mold cavity ⁇ provided for mapping the geometry of a first shell of the liquid container and which is formed between mold wallslitisstes a first and a second mold half of the injection molding tool ⁇ ,
- injection molding tool has at least one secondary cavity
- the secondary cavity is in fluid communication with the mold cavity, wherein the secondary cavity is at least partially adjacent to the mold cavity in an edge region of the mold cavity that is spaced apart from a runner region, and
- the secondary cavity is provided for receiving excess ⁇ gem injection molding material
- first plastic component bears against a mold wall of the first mold half and the second plastic component and the boundary surface are spaced from the mold wall of the first mold half
- the received in the secondary cavity injection molding material of the first and second plastic component is not part of the intended Endgeo ⁇ metry of the liquid container and is therefore removed.
- the secondary cavity thus serves as an overflow or outflow zone for the flow fronts of the plastic components during the injection molding process, so that any inhomogeneities in the layer formation into one of the actual component geometry
- the secondary cavity can be relocated. Removal of the excess injection molding material may be accomplished by, for example, cutting, cutting (e.g., laser or water jet), punching, sawing, or milling. The removed material can be recycled.
- cutting e.g., laser or water jet
- punching e.g., sawing
- milling e.g., milling
- the removed material can be recycled.
- interfaces are where the plastic components adhere to each other, and the interfaces can be formed while the plastic components are in a molten state to provide high strength of the composite form patches between the plastics which promote good adhesion to the layer.
- the liquid container can be composed of exactly two shells, which in this case are called half-shells.
- functional units such as pumps, level sensors, valves and the like can be mounted within the shells or half-shells prior to their connection.
- the second shell can be produced in the mold cavity of the first shell, after the first shell has been removed from the hollow space ⁇ .
- two bowls for a liquid container with a tool with a single mold cavity can be produced in a cost effective manner.
- the second shell may be made in a mold cavity separate from the mold cavity of the first shell.
- a geometry deviating from the first shell can be provided for the second shell.
- the mold cavity of the second shell may be provided in a separate injection molding tool. In this way, the production of the first shell can be done independently of the production of the second shell.
- the mold cavity of the second shell which is separate from the mold cavity of the first shell, can be provided in the same injection molding tool, in which also the mold cavity of the first shell
- the injection molding tool may have two or more mold cavities for producing first trays and second trays.
- four mold cavities ⁇ may be provided in an injection mold, with two mold cavities for Her ⁇ filters of the first shells are provided, and two further mold cavities are provided for producing second shells. In this way, shells for two liquid containers can be manufactured simultaneously in a single injection cycle.
- Each mold cavity may be associated with one or more injection molding nozzles for injecting the plastic components. If the second shell is produced in a mold cavity which is separate from the mold cavity of the first shell, the mold cavity of the second shell likewise has a secondary hollow space which is provided for receiving excess injection-molding material.
- the mold cavity of the first shell and the mold cavity of the second shell separate from the mold cavity of the second shell are provided in an injection mold, their secondary cavities may at least partially be in fluid communication with each other so that the first shell and the second shell after injection molding are cohesively connected to each other via the excess, to be removed injection molding material.
- the manual or automatic ⁇ tometere removal of the shells with a removal tool can ver ⁇ be simplified.
- Provision is made for that provided by the injection molding machine is adapted to Mehrkom ⁇ -component sandwich injection molding, wherein the first and second plastic component in the multicomponent sand ⁇ more injection molded are introduced into the mold cavity and the secondary cavity, wherein the injection of the first Plastic component in the mold cavity begins in time before the injection of the second plastic component and the second plastic component is injected as a core layer in the first Kunststoffkom ⁇ component, so that the first Kunststoffkompo ⁇ nent encloses the core layer.
- sandwich injection molding can be achieved in a simple manner a cross-sectional three-layer wall structure, wherein a core layer at least two sides of cover layers is enclosed.
- the plastics are introduced simultaneously after a time ⁇ staggered start of injection in the course of an injection cycle in the mold cavity and the secondary cavity, so that it can be spoken of a sequential Coinjetation of the plastic components.
- Shrinkage can be achieved via the second plastic component which presses the plastic part against the mold ⁇ walls of the mold halves.
- the first plastic component and the second Kunststoffkompo ⁇ component can be introduced via a common gate or gate into the injection mold.
- Injection of the first plastic component are.
- walls ⁇ ren words in the area of the runner or gating Mate rial can be "refilled” to seal the second plastic component in the area of the gate to the surroundings of the first plastic component.
- the sprue or gate can in a known manner by post-processing at least partially removed, eg by milling.
- the second plastic component can serve as a barrier or diffusion barrier for a fuel.
- connection of the first and second shell can be done by welding.
- the second plastic component of the first shell can be connected to a second plastic component of the second shell to form a continuous, full-surface barrier layer.
- at least three plastic components in the multicomponent injection molding sand ⁇ wich each other to be injected in particular a top layer, an adhesion promoter and a core layer.
- a five-layer structure of the first shell can be achieved.
- the second shell can also be constructed in an analogous manner three, five or more layers.
- the adhesion promoter is used as an intermediate layer to form a layer composite.
- the bonding agent forms both an adhesive connection to the cover layer and to the core layer.
- a mold half is composed of at least two parts of a base body and a mold insert, wherein in particular the mold wall of the mold cavity the
- Main body and a secondary wall of the secondary cavity is associated with the mold insert.
- the mold insert can be manufactured and provided independently of the base body.
- the secondary cavity can be subsequently optimized independently of the basic body.
- the mold cavity is completely enclosed by the secondary hollow space on the circumferential side.
- the mold cavity is completely enclosed by the secondary hollow space on the circumferential side.
- the first plastic component may have a lower viscosity when injected into the mold cavity than the mold second plastic component.
- the first plastic component is a polyamide (PA), a polyphenylene sulfide (PPS), a polyoxymethylene (POM) or a polyphthalamide (PPA)
- the second plastic component is a polyphthalamide (PPA), a polyamide (PA) Polyoxymethylene (POM), a polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polyketone (PK) or an ethylene-vinyl alcohol copolymer (EVOH).
- a plastic component may be a fiber reinforced plastic.
- a granulate advertising provided to having fiber contents of including 10 to 60 weight percent ⁇ , in particular fiber contents of 20 to
- the fibers may be short fibers having a length less than or equal to 12 mm or long fibers having a length greater than or equal to 12 mm, in particular a length of from 12 mm to 25 mm inclusive.
- the fibers may be contained in a granulate to be plasticized or an already plastified plastic admixed ⁇ the.
- the fiber reinforcement makes it possible to produce a robust and dimensionally stable liquid container.
- the first synthetic ⁇ material component a high-density polyethylene (HDPE)
- the second plastics component an adhesion promoter
- the third plastic component is an ethylene-vinyl alcohol copolymer
- the first plastic component may have a lower viscosity when injected into the mold cavity than the second plastic component.
- the third plastic component may have substantially the Vis ⁇ viscosity by the second plastics component, wherein "equal in essence” means that a deviation in the vis- viscosity by the third plastic component relative to the second plastic component in a range of +/- 15%, especially + / - 5%, may be.
- viscosity is used in this case, then this is the changing with the temperature of the plastic components, dynamic viscosity of the plastic components.
- one or more functional units such as one or more pumps, level sensors, valves, nozzles, connection elements or
- function ⁇ units can be integrated into the liquid container in a simple manner.
- the throttle serves to minimize the amount of first and second plastic entering the secondary cavity in order to save on material costs, in other words, the restrictor makes it possible to reduce a required amount In addition to chamber volume.
- the throttle so it is in particular a melting ⁇ technical throttle.
- the throttle can be provided in a simple and cost-effective manner, characterized in that the throttle is formed by a constriction of a cross-sectional shape.
- the throttle can therefore be a narrowing or taper which partially surrounds the mold cavity peripherally, in particular completely encloses ⁇ sondere.
- injecting the plastic therefore, at least in sections first fills the throttle before the plastic passes into the secondary cavity.
- the constriction or taper can be arranged at least in sections, in particular completely, between the mold cavity and the secondary cavity, so that a fluid connection between the mold cavity and the secondary cavity in the region of the throttle is established via the throttle. Starting from a sprue, therefore, a plastic first passes into the hollow space ⁇ and after passing through the throttle in the secondary cavity.
- the arrangement of a throttle or local throttle areas between the mold cavity and the secondary cavity may be adjusted so that in particular a full-surface design of a two-, three- or Moetzi ⁇ gene wall structure results, with the least possible amount of excess material in the region In addition to the cavity.
- the material flow may be a more viscous and more viscous, the second material will be reduced in the direction of the side cavity relative to the first material. This favors a penetration of adjacent area first Material with a second material or the formation of a full-surface layer formation with a second material Form cavities.
- the throttle can locally completely interrupt fluid communication between the mold cavity and the secondary cavity.
- the throttle may have web or wall segments which are provided between the mold cavity and the Mauholraum.
- a method is specified, wherein mold slides are provided for releasing and closing the secondary cavity, with the method steps:
- Partial or complete release of the fluid connection between the mold cavity and the secondary cavity in particular after the injection of the first plastic component and / or the second plastic component.
- the mold pusher could therefore as Drossei to regulate a
- the mold slides may form a variable throttle between the mold cavity and the secondary cavity.
- the shape of the slider can ⁇ A spraying the first plastics component to be closed completely or partially, to provide fluid communication between the molding cavity and the secondary cavity completely partially or at the time the interrupt.
- the mold slides may be wholly or partially opened to partially or completely open fluid communication between the mold cavity and the sub-cavity.
- the invention relates to a liquid container for a motor vehicle, wherein the liquid ⁇ keits capableer has been prepared by the method according to the invention.
- a liquid container can be produced in a cost-effective manner, the shells of which have a two- or multi-layer structure right into the edge regions, so that a barrier layer can be formed.
- the liquid container has an at least three-layered wall structure, wherein a barrier layer is at least partially bordered on at least two sides of cover layers and wherein the barrier layer is formed in particular fully ⁇ area in the wall structure.
- a barrier layer is at least partially bordered on at least two sides of cover layers and wherein the barrier layer is formed in particular fully ⁇ area in the wall structure.
- the lock ⁇ layer may be a diffusion barrier to allow stockpiling of fuel under low diffusion ⁇ -related emissions.
- the barrier layer may be a PPA layer or an EVOH layer, with an EVOH layer forming a barrier layer for hydrocarbons and oxygen.
- the layer structure may locally more than three layers aufwei ⁇ sen, in particular by a mutual welding, gluing and / or penetration of the layers formed in the shells between connecting or joining areas.
- additional adhesives or sealants may be introduced into the Fügebe ⁇ rich.
- the wall structure may be five or more layers, in particular through the use of an adhesion promoter, as previously ⁇ standing explained above, or the integration of additional barrier layers or covering layers.
- the wall thickness of a shell of the liquid container can be 3 mm +/- 1 mm.
- the wall thickness relates in particular to the wall thickness of a shell before connecting to another shell. It is understood that the wall thickness of the liquid container in a connection region, in which the shells of the liquid container abut each other, can result from the sum of the wall thicknesses of the adjacent shells.
- the wall thickness of the liquid container in Wesentli ⁇ Chen also be 3 mm +/- 1 mm, in a kausbe- rich, in which two shells are connected to each other, but locally thickened to about 6 mm.
- the invention relates to a
- An injection molding tool for manufacturing a liquid container for a motor vehicle comprising at least one mold cavity provided for imaging the geometry of a first shell and / or a second shell of the liquid container and formed between mold walls of at least a first and a second mold half of the injection molding tool the injection molding tool has at least one secondary cavity, where ⁇ is in the secondary cavity with the mold cavity in fluid communication, wherein the secondary cavity at least in sections adjacent in a spaced-apart by a gate area edge region of the mold cavity to the mold cavity, and wherein the secondary cavity is provided for receiving excess molding material.
- the design of the injection molding tool favors a particularly full-surface design of a two-, three- or multi-layered wall structure of the liquid container.
- the injection molding tool has a throttle, which is provided for regulating a flow of melt from the mold cavity to the secondary cavity.
- the throttle allows a reduction of a required secondary chamber volume. Therefore, when the throttle is insbeson ⁇ particular a melting technical throttle.
- the throttle can be provided in a simple and cost-effective manner, characterized in that the throttle is formed by a constriction of a cross-sectional shape.
- the throttle can therefore be a narrowing or taper which partially surrounds the mold cavity peripherally, in particular completely encloses ⁇ sondere. When injecting the plastic, therefore, at least in sections first fills the throttle before the plastic passes into the secondary cavity.
- the constriction or taper can be arranged at least in sections, in particular completely, between the mold cavity and the secondary cavity, so that a fluid connection between the mold cavity and the secondary cavity in the region of the throttle is established via the throttle. Starting from one Anguss passes a plastic therefore first in the hollow space ⁇ and after passing the throttle in the secondary cavity.
- such a taper or narrowing between the mold cavity and the secondary cavity may also be provided only in sections.
- the arrangement of a fully rotating throttle or multiple local throttle areas between the mold cavity and the secondary cavity may be adapted such that a particular full-surface design of a two-, three- or more ⁇ layered wall structure, with a possible small amount of excess material in the area of the secondary cavity, is favored.
- the material flow may be a more viscous and more viscous, the second material will be reduced in the direction of the side cavity relative to the first material. This favors a penetration of adjacent region of the first material with a second material or the formation of a full- surface layer formation with a second material in the mold cavity.
- the throttle may be segmented for local regulation of the melt flow. In one or more subregions, therefore, the mold cavity may transition directly into the sub-cavity without an interposed choke. In one or more further sub-areas can be between the
- Mold cavity and the secondary cavity may be provided the throttle.
- the reactor can be in a top view of a mold half ⁇ considered example, be arranged along two longitudinal sides of a mold cavity between the mold cavity and the secondary cavity, while along two lateral sides the mold cavity is disposed no throttle between the mold cavity and the secondary cavity.
- the throttle may completely surround the mold cavity in a cross section or plan view.
- a ⁇ Regu-regulation of the melt flow in particular a local regu ⁇ tion of the melt flow, can be effected in that the throttle sections forms a lower or higher resistance for the Schmelzetluss. This can be ⁇ example by a section adapted
- the throttle may be configured to locally completely interrupt a fluid connection between the mold cavity and the secondary cavity.
- the throttle may have web or Wan ⁇ training segments, which are provided between the mold cavity and the Mauholraum.
- an injection molding tool is specified, wherein mold slides are provided for releasing and closing the secondary cavity.
- the mold slides may therefore serve as a restrictor for regulating a flow of melt between the mold cavity and the secondary cavity.
- the mold slides may be configured as a variable throttle between the mold cavity and the secondary cavity.
- the mold slide at the time of A ⁇ spraying of the first plastic component may be closed completely or partly, in order to interrupt a fluid communication between the mold cavity and the secondary cavity partially or completely.
- the mold slides can be fully or partially open to partially or completely open a fluid connection between the mold cavity and the secondary cavity.
- the mold slides can be infinitely adjustable between two end positions, in particular an open position and a closed position.
- the mold slides can be arranged exclusively on the first mold half.
- the mold slides can be arranged exclusively on the second mold half.
- the mold slides may be disposed on the first mold half and the second mold half.
- First mold slides for producing a first shell of the liquid container can be provided and arranged on the first mold half. There may be provided second mold slides for producing a second shell of the liquid container and arranged on the first mold half.
- the injection molding tool during the injection molding process may comprise one or meh ⁇ eral vents for venting of the mold cavity and / or the secondary cavity.
- the invention will be described in detail with reference to a1,sbei ⁇ games performing drawing. Each show schematically:
- FIG. 1 shows a liquid container for a motor vehicle.
- FIG. 3 shows a two-component injection molding according to FIG. 2;
- FIG. 5 shows the injection molding tool from FIG. 2;
- FIG. 6 shows an injection molding tool with a throttle; a filling process for an injection molding tool of Fig. 6; a filling process for an injection molding tool according to FIG. 5 resp. Fig. Second
- the fuel tank 2 is made of two half-shells 4, 6, a first shell and a second shell 4 6, assembled, which have been connected in the region of a plane E MITEI ⁇ Nander.
- the liquid container 2 has a three-layer wall structure.
- a barrier layer 8 is bordered on two sides by an inner cover layer 10 and an outer cover layer 12.
- the barrier layer 8 is formed over the entire surface in the wall structure from ⁇ .
- a void volume 14 which is provided for the storage of fuel, completely enclosed by the barrier layer 8.
- the barrier layer 8 is a diffusion barrier to keep a diffusion-related emissions during the storage of the motor ⁇ substance low.
- a wall thickness t of the shells 4, 6 of the liquid container 2 is 3 mm +/- 1 mm.
- the liquid container 2 has been produced by a method according to the invention, which will be explained below.
- a gasoline machine 16 is ready ⁇ provides, which is set up for two-component sandwich injection molding.
- the injection molding machine 16 has an injection molding tool 18.
- the injection molding tool 18 has at least one mold cavity 20, which is provided for imaging the geometry of the first shell 4 of the liquid container 2. In the present case, the shell 4 is received in the mold cavity 20.
- the mold cavity 20 is between mold walls 22, 24 least a first and a second mold half 26, 28 of the injection molding tool 18 ge ⁇ forms.
- the injection molding tool 18 has 30.
- the Ne ⁇ benhohlraum 30 communicates with the mold cavity 20 dung a secondary cavity in Fluidverbin-.
- the secondary cavity 30 is adjacent to one of a
- the secondary cavity 30 is for receiving excess
- Injection molding material 36 is provided.
- the secondary cavity 30 is filled with excess injection molding material 36.
- the first shell 4 has been made by plasticizing and injecting a first plastic component 38 and plastifying and injecting a second plastic component 40 into the mold cavity 20.
- the first and second plastic components 38, 40 are ent ⁇ together an interface 42 interconnected.
- the first plastic component 38 bears against the mold wall 22 of the first mold half 26 and against the mold wall 24 of the second mold half 28.
- the second plastic component 40 and the interface 42 are spaced from the mold walls 22, 24.
- the secondary cavity 36 is filled with excess injection-molded material 36 of the first and second plastic components 38, 40.
- the second shell 6 can be produced in an analogous manner. After removal from the respective mold, the first and second shell 4, 6 are connected to each other, so that a continuous barrier layer 8 is formed (Fig. 1). This can be achieved by heating and pressing the layers. Removal of excess molding material 36 of the first and second plastic component 38, 40 is carried vorlie ⁇ quietly after the joining of the shells 4, 6 to the liquid container 2. In the finished liquid container 2, the excess molding material 36 is no longer present (Fig. 1).
- the plastic components 38, 40 are sequentially injected into one another.
- the first and second plastic components 38, 40 are in the two-component sandwich injection molding in the Mold cavity 20 and the secondary cavity 30 introduced (Fig. 3).
- Injection of the first plastic component 38 into the mold cavity 20 commences prior to injection of the second plastic component 40 ( Figure 3b).
- the second plastic component 40 is injected as a core layer in the first plastic material component ⁇ 38, so that the first plastic ⁇ component 38 encloses the core layer 40th
- the first plastic component 38, 40 are sequentially injected into one another.
- the first and second plastic components 38, 40 are in the two-component sandwich injection molding in the Mold cavity 20 and the secondary cavity 30 introduced (Fig. 3).
- Injection of the first plastic component 38 into the mold cavity 20 commences prior to injection of the second plastic component 40 ( Figure 3b).
- the second plastic component 40 is injected as a core layer in the first plastic material component ⁇ 38, so that the first plastic ⁇ component 38 encloses the core layer 40
- Plastic component 38 is a polyamide (PA) and the second plastic component 40 is a polyphthalamide (PPA).
- PA polyamide
- PPA polyphthalamide
- At least three plastic components 44, 46, 48 injected in Mehrkompo ⁇ -component sandwich injection-molding into each other and, although a topsheet 44, a bonding agent 46, and a core layer 48 and barrier layer 48 so that there is a five-layer Wandungsauf ⁇ construction (Fig. 4).
- the cover layer 44 is a high-density polyethylene (HDPE).
- the barrier layer is an ethylene-vinyl alcohol copolymer (EVOH).
- EVOH ethylene-vinyl alcohol copolymer
- the HDPE has during injection into the mold cavity 20 as the adhesion promoter a lower viscosity, wherein said EVOH has substantially the viscosity of the bonding agent on ⁇ .
- the mold half 26 is composed at least in two parts of a base ⁇ body 26a and a mold insert 26b, wherein the mold wall 22 of the mold cavity 20 the main body 26a and a secondary wall 50 of the secondary cavity 30 to the mold insert 26b is assigned.
- the mold half 28 we ⁇ antecedents two parts from a main body 28a and a mold for use ⁇ 28b composed (Fig. 2, Fig. 5a).
- the mold cavity 20 is circumferentially completely enclosed by the secondary cavity 30 in a cross section along the sectional plane S (FIGS. 5a, 5a).
- the barrier layer 8 is therefore formed over its entire surface over the entire wall of the shell 4.
- the shell 6 can be prepared in analo ⁇ ger manner.
- the first plastic component 38 has a lower viscosity during injection into the mold cavity 20 than the second plastic component 40.
- the temperature of the plastics 38, 40 is set in the region of a respective melting and conveying unit 52 of the injection molding machine 16 (FIG. 2).
- Fig. 6a shows schematically an injection molding tool 56 in a plan view.
- the injection molding tool 56 has a cavity 60.
- the injection molding tool 56 has a restrictor 62.
- the restrictor 62 is provided to regulate a flow of melt from the mold cavity 58 to the secondary cavity 60, the melt via a gate 59 in FIG the mold cavity 58 is introduced.
- FIG. 6b shows a cross section of the injection molding tool 56 along a section line AA, wherein both a first mold half 54 and a second mold half 68 of the injection mold 56 are shown in the section.
- the throttle 62 is integrally incorporated into the injection molding tool 56.
- the throttle 62 is designed as a local constriction adjacent to the mold cavity 58.
- the throttle 62 represents a melting-technical throttle between the mold cavity 58 and the secondary cavity 60.
- the distance of the facing mold walls 64 and 66 is less in the region of the throttle 62, as in the region of the mold cavity 58 and in the region of the secondary cavity 60th
- Fig. 6c shows a variant in which the throttle 62 is configured by means of slide valves 70, which are displaceable relative to the first mold half 54 and the second mold half 68, to block or release fluid communication between the mold cavity 58 and the secondary cavity 60.
- the tool 56 can have a plurality of form slides 70 on ⁇ .
- the flow of material ei ⁇ ner first plastic component 72 and a second plastic ⁇ material component 74 can be using the throttle 62.
- the throttle 62 can be achieved in this way a full-surface formation of a Wegschich ⁇ term or multilayer wall structure with low material costs.
- FIGS. 8 shows by way of example the filling process for an injection molding tool 76 without a throttle, as shown for example in FIGS. 1 and 5.
- a full-surface layer formation of a first plastic component 72 with a ner second plastic component 74 can be achieved over the entire mold cavity 58 away.
- the materials 72, 74 in the region of the secondary cavity 60 spread over a substantially larger area, and follow less precisely the base area of the mold cavity 58.
- Throttle 62, mold slide 70 and / or secondary cavity 60 may be provided in separate mold inserts.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016214059.0A DE102016214059B4 (de) | 2016-07-29 | 2016-07-29 | Verfahren zum Herstellen eines Flüssigkeitsbehälters und Flüssigkeitsbehälter für ein Kraftfahrzeug |
| PCT/EP2016/079030 WO2018019396A1 (de) | 2016-07-29 | 2016-11-28 | Verfahren zum herstellen eines flüssigkeitsbehälters, flüssigkeitsbehälter für ein kraftfahrzeug und spritzgusswerkzeug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3490776A1 true EP3490776A1 (de) | 2019-06-05 |
| EP3490776B1 EP3490776B1 (de) | 2020-10-21 |
Family
ID=57539211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16809305.2A Active EP3490776B1 (de) | 2016-07-29 | 2016-11-28 | Verfahren zum herstellen eines flüssigkeitsbehälters, flüssigkeitsbehälter für ein kraftfahrzeug und spritzgusswerkzeug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11040613B2 (de) |
| EP (1) | EP3490776B1 (de) |
| CN (1) | CN109843538B (de) |
| DE (1) | DE102016214059B4 (de) |
| WO (1) | WO2018019396A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017222256A1 (de) * | 2017-12-08 | 2019-06-13 | Bayerische Motoren Werke Aktiengesellschaft | Kraftstofftank für ein Kraftfahrzeug, insbesondere für ein Motorrad, sowie Verfahren zum Herstellen eines Kraftstofftanks |
| DE102018208165A1 (de) * | 2018-05-24 | 2019-11-28 | Bayerische Motoren Werke Aktiengesellschaft | Kraftstofftank und Verfahren zur Herstellung eines Kraftstofftanks |
| US20200247025A1 (en) * | 2019-01-31 | 2020-08-06 | XRSpace CO., LTD. | Method of molding a product including at least one turning part including at least one of an undercut part and a right-angle part, product manufactured by the method, and molding device manufacturing the product by the method |
| DE102019210375A1 (de) * | 2019-07-12 | 2021-01-14 | Continental Teves Ag & Co. Ohg | Verfahren zur Herstellung eines robusten Sensors |
| DE102020128011A1 (de) * | 2020-10-23 | 2022-04-28 | Röchling Automotive Se & Co.Kg | Sandwich-Kraftfahrzeugtank mit Barrierefolie und angespritzten Tankinnenwänden und Tankaußenwänden |
| DE102020128012A1 (de) | 2020-10-23 | 2022-04-28 | Röchling Automotive SE & Co. KG | Sandwich-Kraftfahrzeugtank mit ausgestülpter Barrierefolie und daran wenigstens lokal angespritztem thermoplastischem Material |
| KR20250034669A (ko) * | 2023-09-04 | 2025-03-11 | 현대모비스 주식회사 | 차량의 누광 방지장치 및 이의 제조방법 |
| CN119238898B (zh) * | 2024-12-03 | 2025-04-08 | 宁波四维尔汽车零部件有限公司 | 一种车标制作方法及系统 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3256835B2 (ja) * | 1996-08-12 | 2002-02-18 | ポリプラスチックス株式会社 | 樹脂成形品のサンドイッチ成形方法及びその金型並びに樹脂成形品 |
| JP2004098511A (ja) * | 2002-09-10 | 2004-04-02 | Fts:Kk | 燃料タンクの製造方法及びその装置 |
| AT507444B1 (de) * | 2008-11-14 | 2010-11-15 | Engel Austria Gmbh | Verfahren zur herstellung eines kunststoffteils |
| WO2011020582A1 (en) * | 2009-08-18 | 2011-02-24 | Basell Polyolefine Gmbh | Plastic fuel container for motor bikes or automotive hybrid cars |
| CN101746012B (zh) | 2010-01-26 | 2012-10-10 | 华尔达(厦门)塑胶有限公司 | 出水装置水道的制作工艺 |
| DE102010046378B4 (de) | 2010-09-24 | 2015-07-09 | Kautex Textron Gmbh & Co. Kg | Mehrschichtige Kunststoffartikel mit Barriereeigenschaften und Verfahren zur Herstellung derselben |
| CN102729405A (zh) | 2011-04-12 | 2012-10-17 | 苏州腾行精密模具有限公司 | 模具溢料槽 |
| ITTO20130837A1 (it) * | 2013-10-16 | 2015-04-17 | Plastic Components And Modules Auto Motive S P A | Serbatoio di combustibile per un veicolo con migliorata resistenza alla combustione e procedimento per la sua fabbricazione |
-
2016
- 2016-07-29 DE DE102016214059.0A patent/DE102016214059B4/de active Active
- 2016-11-28 CN CN201680089610.0A patent/CN109843538B/zh active Active
- 2016-11-28 EP EP16809305.2A patent/EP3490776B1/de active Active
- 2016-11-28 US US16/321,779 patent/US11040613B2/en active Active
- 2016-11-28 WO PCT/EP2016/079030 patent/WO2018019396A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016214059A1 (de) | 2018-02-01 |
| EP3490776B1 (de) | 2020-10-21 |
| DE102016214059B4 (de) | 2021-05-20 |
| WO2018019396A1 (de) | 2018-02-01 |
| CN109843538A (zh) | 2019-06-04 |
| CN109843538B (zh) | 2021-12-10 |
| US20200376953A1 (en) | 2020-12-03 |
| US11040613B2 (en) | 2021-06-22 |
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